Metal treatment – Compositions – Heat treating
Patent
1988-06-17
1989-11-07
Roy, Upendra
Metal treatment
Compositions
Heat treating
148 115N, 148402, C22C 901, C22F 108, C22F 110
Patent
active
048789542
ABSTRACT:
A process is disclosed for improving the ductility of shape-memory alloy products based on Ti-Ni involving martensitic transformation. The process comprises at least one thermal treatment cycle of alternating hot and cold treatment, wherein the first thermal treatment cycle comprises a cold treatment at a temperature both lower than -50.degree. C. and lower than M.sub.s -50.degree. C., where M.sub.s is the temperature at which martensitic transformation of the product begins, and a hot treatment of the product at a temperature of 700.degree. to 900.degree. C. Each optional subsequent thermal treatment cycle comprises a cold treatment of the product at a temperature both lower than -50.degree. C. and lower than M.sub.s -30.degree. C., and a hot treatment of the product at a temperature of 600.degree. to 900.degree. C.
REFERENCES:
patent: 4067752 (1978-01-01), Brook et al.
patent: 4304613 (1981-12-01), Wang et al.
patent: 4707196 (1987-11-01), Honma et al.
patent: 4953253 (1976-04-01), Clark
Izuno, Jap. Jour. Electrical Engg., 20, (Sep. 1983), p.89.
Enami et al., Scripta Met., 5, (1971), p. 663.
Sade et al., Z. Metallkde, 79, (1988), 487.
Dubertret Alain
Prandi Bernard
Compagnie Europeenne Du Zirconium Cezus
Roy Upendra
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